Given
A beam of light is incident on a glass plate, n =1.7, and the reflected ray is completely polarized.
To find
The angle of refraction
Explanation
Since the refleted ray is completely polarised.
[tex]\begin{gathered} tani=n \\ \Rightarrow i=tan^{-1}(1.7) \\ \Rightarrow i=59.53^o \end{gathered}[/tex]By Snell's law,
[tex]\begin{gathered} \frac{sini}{sinr}=n \\ \Rightarrow\frac{sin59.53^o}{sinr}=1.7 \\ \Rightarrow sinr=0.506 \\ \Rightarrow r=30.39^o \end{gathered}[/tex]Conclusion
The angle of refraction is
[tex]30.39^o[/tex]